"Mike Coslo" wrote in message ...
Lou wrote:
"Nitespark" wrote in message
news:e4i5c.2994$F91.2580@lakeread05...


Rare Old Things wrote:


Hello group and thanks for any help you can share

We have a basic baby monitor set up in the nursery and the extensions

are set

up in our bedroom and the livingroom.

Twice now we have clearly heard transmissions of our baby and our own
conversations that occured 15 minutes earlier.

This morning my wife and I were standing in our room WITH the baby
while

we

listened to him crying on our monitor and her going in to get him which
happpened about 15 minutes ealier. Very odd to me.

How is is this possible? Is this possible?

It was definately not some other picked up transmission from the

neighborhood.

It was like time delayed transmission.

Very curious.


This also happened once before

Thanks for any help. Im very curious how this is possible


You do know that by installing a baby monitor in your home, you are in
effect placing a "bug" in your home that ANYONE can listen to and record
and play back at will don't you????


--
Hydrogen & Stupidity...the two most common elements in the universe.



Guys, you would be SURPRISED how many people do NOT know that. I've told
a
few about their cordless phones and they damned near had a heart attack.
Not
people I would be able to hear, but people in general. They just don't
know.
I've never bought a baby monitor, so I don't know what the instructions
may
say. Maybe they should state that ALL transmissions are able to be
picked up
by scanner radios. Maybe it is in there and they just don't read the
directions - who knows? But they are completely unaware of their
actions.

If a person doesn't know that a microphone and transmitter inside their
house will transmit sound to wherever, They will be hard pressed to know
anything.

- Mike -

Well! I think we can rest OUR case because many do NOT. Take a poll
sometime, you won't believe it. Lou

Long path DX?


"Lou" wrote in message
...

"Nitespark" wrote in message
news:e4i5c.2994$F91.2580@lakeread05...


Rare Old Things wrote:

Hello group and thanks for any help you can share

We have a basic baby monitor set up in the nursery and the extensions
are set
up in our bedroom and the livingroom.

Twice now we have clearly heard transmissions of our baby and our own
conversations that occured 15 minutes earlier.

This morning my wife and I were standing in our room WITH the baby
while
we
listened to him crying on our monitor and her going in to get him
which
happpened about 15 minutes ealier. Very odd to me.

How is is this possible? Is this possible?

It was definately not some other picked up transmission from the
neighborhood.
It was like time delayed transmission.

Very curious.


This also happened once before

Thanks for any help. Im very curious how this is possible


You do know that by installing a baby monitor in your home, you are in
effect placing a "bug" in your home that ANYONE can listen to and record
and play back at will don't you????


--
Hydrogen & Stupidity...the two most common elements in the universe.


Guys, you would be SURPRISED how many people do NOT know that. I've told a
few about their cordless phones and they damned near had a heart attack.
Not
people I would be able to hear, but people in general. They just don't
know.
I've never bought a baby monitor, so I don't know what the instructions
may
say. Maybe they should state that ALL transmissions are able to be picked
up
by scanner radios. Maybe it is in there and they just don't read the
directions - who knows? But they are completely unaware of their actions.
Lou

Lou wrote:
"Nitespark" wrote in message
news:e4i5c.2994$F91.2580@lakeread05...


Rare Old Things wrote:


Hello group and thanks for any help you can share

We have a basic baby monitor set up in the nursery and the extensions

are set

up in our bedroom and the livingroom.

Twice now we have clearly heard transmissions of our baby and our own
conversations that occured 15 minutes earlier.

This morning my wife and I were standing in our room WITH the baby while

we

listened to him crying on our monitor and her going in to get him which
happpened about 15 minutes ealier. Very odd to me.

How is is this possible? Is this possible?

It was definately not some other picked up transmission from the

neighborhood.

It was like time delayed transmission.

Very curious.


This also happened once before

Thanks for any help. Im very curious how this is possible


You do know that by installing a baby monitor in your home, you are in
effect placing a "bug" in your home that ANYONE can listen to and record
and play back at will don't you????


--
Hydrogen & Stupidity...the two most common elements in the universe.



Guys, you would be SURPRISED how many people do NOT know that. I've told a
few about their cordless phones and they damned near had a heart attack. Not
people I would be able to hear, but people in general. They just don't know.
I've never bought a baby monitor, so I don't know what the instructions may
say. Maybe they should state that ALL transmissions are able to be picked up
by scanner radios. Maybe it is in there and they just don't read the
directions - who knows? But they are completely unaware of their actions.

If a person doesn't know that a microphone and transmitter inside their
house will transmit sound to wherever, They will be hard pressed to know
anything.

- Mike -

"Nitespark" wrote in message
news:e4i5c.2994$F91.2580@lakeread05...


Rare Old Things wrote:

Hello group and thanks for any help you can share

We have a basic baby monitor set up in the nursery and the extensions
are set
up in our bedroom and the livingroom.

Twice now we have clearly heard transmissions of our baby and our own
conversations that occured 15 minutes earlier.

This morning my wife and I were standing in our room WITH the baby while
we
listened to him crying on our monitor and her going in to get him which
happpened about 15 minutes ealier. Very odd to me.

How is is this possible? Is this possible?

It was definately not some other picked up transmission from the
neighborhood.
It was like time delayed transmission.

Very curious.


This also happened once before

Thanks for any help. Im very curious how this is possible


You do know that by installing a baby monitor in your home, you are in
effect placing a "bug" in your home that ANYONE can listen to and record
and play back at will don't you????


--
Hydrogen & Stupidity...the two most common elements in the universe.


Guys, you would be SURPRISED how many people do NOT know that. I've told a
few about their cordless phones and they damned near had a heart attack. Not
people I would be able to hear, but people in general. They just don't know.
I've never bought a baby monitor, so I don't know what the instructions may
say. Maybe they should state that ALL transmissions are able to be picked up
by scanner radios. Maybe it is in there and they just don't read the
directions - who knows? But they are completely unaware of their actions.
Lou

Regarding people being able to eavesdrop on baby monitors and cordless
phones... I'm sure this is true for the baby monitors and older phones.
But aren't the newer digital and spread-spectrum cordless phones at least
much harder, if not impossible, to eavesdrop on? I'm sure with the right
amount of knowledge, computer equipment, and decoders it could be done,
but your average scanner junkie isn't going to go to that much trouble.
Am I wrong?

Jay

N0TIB
-----

JayV wrote:

Regarding people being able to eavesdrop on baby monitors and cordless
phones... I'm sure this is true for the baby monitors and older phones.
But aren't the newer digital and spread-spectrum cordless phones at least
much harder, if not impossible, to eavesdrop on? I'm sure with the right
amount of knowledge, computer equipment, and decoders it could be done,
but your average scanner junkie isn't going to go to that much trouble.
Am I wrong?

For interception and decoding of spread spectrum signals, you need to
know the method (FH, direct sequence, etc.), the hop pattern or
spreading polynomial, the current point in the hop or spreading
sequence, and so on. None of this is trivial, but enough patience
will yield some or all of it.

The hardest part, of course, is determining _how_ the freq. hopping or
the spreading is being done, i.e., the pattern or polynomial and the
current point. It's really a problem in modern cryptography, which can
be made easier if the system (e.g., phone manufacturer) is known,
since you can buy one and scope out the interesting stuff, like
the FH pattern or spreading sequence.

If the spreading sequence is generated by an LFSR and you have more
than 2*length_of_LFSR consecutive bits of the spreading sequence, it
is a "trivial" exercise in linear algebra to recover the tap sequence
of the LFSR and build a simulator. From there you try to determine
how the LFSR is initialized for a phone call, and once you have that
you're home free.

--
Mike Andrews

Tired old sysadmin

JayV wrote:

Regarding people being able to eavesdrop on baby monitors and cordless
phones... I'm sure this is true for the baby monitors and older phones.
But aren't the newer digital and spread-spectrum cordless phones at least
much harder, if not impossible, to eavesdrop on? I'm sure with the right
amount of knowledge, computer equipment, and decoders it could be done,
but your average scanner junkie isn't going to go to that much trouble.
Am I wrong?

For interception and decoding of spread spectrum signals, you need to
know the method (FH, direct sequence, etc.), the hop pattern or
spreading polynomial, the current point in the hop or spreading
sequence, and so on. None of this is trivial, but enough patience
will yield some or all of it.

The hardest part, of course, is determining _how_ the freq. hopping or
the spreading is being done, i.e., the pattern or polynomial and the
current point. It's really a problem in modern cryptography, which can
be made easier if the system (e.g., phone manufacturer) is known,
since you can buy one and scope out the interesting stuff, like
the FH pattern or spreading sequence.

If the spreading sequence is generated by an LFSR and you have more
than 2*length_of_LFSR consecutive bits of the spreading sequence, it
is a "trivial" exercise in linear algebra to recover the tap sequence
of the LFSR and build a simulator. From there you try to determine
how the LFSR is initialized for a phone call, and once you have that
you're home free.

--
Mike Andrews

Tired old sysadmin

Regarding people being able to eavesdrop on baby monitors and cordless
phones... I'm sure this is true for the baby monitors and older phones.
But aren't the newer digital and spread-spectrum cordless phones at least
much harder, if not impossible, to eavesdrop on? I'm sure with the right
amount of knowledge, computer equipment, and decoders it could be done,
but your average scanner junkie isn't going to go to that much trouble.
Am I wrong?

Jay

N0TIB
-----

While I do not know what frequency you monitor uses I do know that in my
neiborhood most of them seem to on the 49mhz band and have surprising
range. When we last used a baby monitor in 1996 - 1998 we could hear up
to 3 different ones on the monitor itself. At about that time I got a
ham transceiver which had coverage of the 49mhz band and found that with
my 50mhz directional antenna (6 meter band) I could hear baby monitors
from almost a mile in all directions, as well as the older 49mhz
cordless phones at almost the same distance.

What people don't understand is that these devices radiate a pretty good
signal than can be heard a long way with the right receiving equipment.
Very old cordless phones operating in the 1.7mhz band could be heard at
astounding distances.

I would guess that you have a neighbor whi is in fact recording your
conversations and the baby crying and transmitting them back.

73
George
K3UD


In article ,
(Rare Old Things) wrote:

Hello group and thanks for any help you can share

We have a basic baby monitor set up in the nursery and the extensions are set
up in our bedroom and the livingroom.

Twice now we have clearly heard transmissions of our baby and our own
conversations that occured 15 minutes earlier.

This morning my wife and I were standing in our room WITH the baby while we
listened to him crying on our monitor and her going in to get him which
happpened about 15 minutes ealier. Very odd to me.

How is is this possible? Is this possible?

It was definately not some other picked up transmission from the neighborhood.
It was like time delayed transmission.

Very curious.


This also happened once before

Thanks for any help. Im very curious how this is possible

"Rare Old Things" wrote in message
...
Hello group and thanks for any help you can share

We have a basic baby monitor set up in the nursery and the extensions are
set
up in our bedroom and the livingroom.

Twice now we have clearly heard transmissions of our baby and our own
conversations that occured 15 minutes earlier.

This morning my wife and I were standing in our room WITH the baby while
we
listened to him crying on our monitor and her going in to get him which
happpened about 15 minutes ealier. Very odd to me.

How is is this possible? Is this possible?

It was definately not some other picked up transmission from the
neighborhood.
It was like time delayed transmission.

Very curious.


This also happened once before

Thanks for any help. Im very curious how this is possible

You're _sure_ you aren't hearing a neighbor's baby monitor? We sure did on
occasion. It was very comforting to know that other folks were suffering
through the same things we were!

Otherwise you have a very odd baby monitor that's recording things, or a sly
neighbor who's recording and playing back.